Stability Analysis of Electric Vehicle Integrated Microgrid for Power Frequency Balance

This paper aims to design the stability margin of an aggregated electric vehicle (EV) for supporting automatic generation control (AGC) operation in an islanded microgrid (IMG) with renewable power producers (RPPs) and energy storage devices (ESDs). Challenge of ensuring better power management while introducing EV in modern power system is the foreground in the IMG system. A groundbreaking attempt has been adopted to determine the stability margin of an aggregated EV model based on its participation, state of charge and power rating. In this context, this proposed work presents a novel proportional integral feedback with proportional derivative (PI-PD) controller for investigating system performance under various conditions. The presence of PD controller in the inner loop ensures better stability enabling the suitable open loop pole placement which assures desirable system response. Over the years, tuning of the controller parameters becomes a new challenge to the researchers. Given this, particle swarm optimization (PSO) is employed here to tune the gain parameters of the controller. Further, comparison studies are also carried out to verify the controller performance. Several case studies are formulated and presented under the MATLAB/Simulink environment to validate the performance of the proposed system configuration.